Embroidery machine



b 22, 27 M. HADAM EMBROIDERY MACHINE Filed Sept. 3, 1925 gg@ A Patented Feb. 22, 1927.v

UNITED vSTATES PATENT OFFICE.

AIMAX HADAM, 0E CHEMNITZ, VGERMANY, ASSIGNOR TO vFIRMA MAS(1I-IINELTFILBRIIIKl KAPPEL, 0F CHEMNITZ-KAPEL. Y i v EMBROIDERY MACHINE.

` Application filed September 3, 1925, Serial No. 54,325, and in Germany September 9, 1924.

This invention relates to improvements in embroidery machines of the type in which the work is mounted in a trame, the horizontal and vertical movements of which, at each stitch, are controlled troma jacquard pattern cardand the invention is more particularly directed to the mechanism by which the constant movement of a driving' member is transmuted into a desired variable movementV of the work frame setting rack in accordance with the pattern to be embroidered.

In machines of this kind, it has already been proposed to employ a series oi levers or a combination of toothed wheel-s, levers -and\worn\r ge\ar which eiected the desired result. In one knownconstructionga series of toothed wheels are selectively clntcledn` by jacquard controlled mechanism, so as to makea half revolution and thereby operate selected levers or a selected lever for transmitting a greater or lesser'movement to the frame operating rack. In this construction the toothed Wheels are moved sidewise from the jacquard selecting device and the entire mechanism is apt to give an inaccurate result owing to wear of the teeth as well as to varying elasticity or flexibility of the lever structure which is interposed between they toothed Wheels andthe :trame rack. In a continuous lever structure, having equal armed double levers, in which the end ci one lever is articulated to the centre of the next, therev is only yone ixed point in the lever' system, which consequently has an undesirable degree of elasticity leading to inaccuracy and irregularity ofV .setting of the work frame. In these systems, as in the presentv invention, the racme is moved through a selected number of units, the maximum number of units of any movement being about 60.

According to the, present invention, the stitch adjusting device is composed of a series of interconnected levers, forming the chainI of 'levers for transmutingthe constant movement of the driving member into a variable movement of the work trame rack, by selectively moving or holding stationary lthe intermediate point pivots of said levers. The members which move the intermediate point pivots of the levers of the chain are themselves levers and the main feature ot novelty of the present invention resides in the fact that the fulcrums of these adjusting levers are fixed. pointsz being conveniently mounted in the machine trame or in brackets :lixed to the machin-e trame. The result of this arrangement is that, at all possible settings of the device, a high degree of rigidity is obtained with consequent accuracy and wit-hout the need of toothed wheels. The adjust-ing levers, that is the members which move the pivot points of the lever chain, are operated by rods having clutch members which are either in engagef ment with a ixed bar, 4so as to hold the given ladjusting lever stationary or 1n engagement with the 'driving member which executes a constant movement. The selection as to whetherr the rods engage with the xed bar or with. the constant driving member is made by the feeler pins which are controlled by the jacquard pattern card. These pins operate to set the butts oi sliding jacks in such positions that they either intercept, or do not intercept, fall leversarticulated to the operating rods. A fallv lever when so lintercepted by the butt of a ack, places `Vthe operating rod to which it is articulated in operative engagement with the constant movement driving member. The fallv levers not so intercepted allow their operating rods to engage with the fixed bar, whereby the corresponding adjusting levers are held stationary.

The invention will be more readily understood from the following description. of the vform shown in the accompanying drawings which show in diagrammatic form, the chain or system 4of levers together with theV adjusting levers and the train of mechanism interposed between the jacquard pattern Vcard and the adjusting levers.

It has not been considered necessary to illustrate the entire machine, but only so much as is required to explain the operation of the present invention. The remainder of .the structure, the duplication necessary for horizontal as well as vertical movement of the work frame, thel trame reversing. mechanism and the other stitch controls which may be used are disposed in the manner known in such machines andwill be readily understood by those engaged in this art..

vThe work frame is operated from a rack 26 which is moved backwards and forwards ill at each stitch hy a predetermined amount, which is varied in accordance with the stitch required at the particular part ot the pattern under execution. The raclr 26 is always returned at the completion oit each stitch to its initial position. rlhis rack is olf 1con forni and is provided with tivo sets oli' teeth at 26 and 2Gb and einh aces a pinion 55, with one or other ot these sets of teeth in engagement with the pinion, according1 to the setting of the rack 2G. ln accordance with which set of teeth, 2G or 2Gb, is engaged, the

`pinion 55 is rotated in one or other direction. By the known ineens the rotary'niovenient of the pinion 55 is transmitted as a. linear movernent to the Werl; traine. The reversal ot the pinion is eiiected by swing ing the hoz; racl; ilo, by nieans et the lever 26C, which is suitably controlled in the Well understood manner by tivo rows or' holes in the jacquard pattern card AlJV .The constant inoveinent of the driving ineinher is cllectcd .'lroni the cani el@ which operates a rod Llil" coupled to two hell crank levers d8 and all). .lhe hell cranli levers stil and -l-ll are operated at cach stitch to swing to and iro over the anglo indicated by dot and dash lines. The mechanism interposed between the rack Q6 and the constant drive `n'ieehanisni embodied by the levers it and Ll-SJ constitute the subject niatter o1" this invention. By means ot this interposed inechaniisin, the constant inovei'nont ol the hell crank levers 4:8 and il!) is transniuted into a nioveinent oi any desired multiples of a predeterinined unit up to a total or' 623 units.

The levers l, il, l, fl, 5, (E, constitute a douhie series and are the adjusting levers, each of which has a .lined itllcruln. The levers 1, Q, 3 have their lined liulcruins "l", 8, 9 at one end, Whilst the parallel series ot adjustinglevers have their lined :lulcrunis l0, ll and l2 at an intermediate point such that the tivo arnis are unequal. The ratio of these arins may be arranged in accordance with the desired length ot a unit7 oi 1novement oii the ivorl: traine. tln the adjusting;l levers there are pivoted at intermediate points, in the ratio of tivo to one, levers lli, 14, 15, 16, l?, 18, which are interconnected at their ends to iorni a chain ol' levers in series, hy niieans ot connecting rods or links 19, 20, 2l, 22, Q3, ill. The rod 'i9 at one end oli this chain is anchored t-o a lined pivot and the short arni of the lever 1S at the other end oi' the chain is connected to the ack 2G for seitinfr the ivorlt 'li-aine. It desjired the ratio of the arins oLt the levers 13 to 18, nray he other than that shown, viz, 2:1.

It will be seen that the levers oi the chain 13-18 are so interconnected that the short arm oit' one lever is articulated to the long arm oit' the nent lolloivin The adjusting levers l, 2, are articulated terence at their free ends to the connecting rods 2'?, 2S, ill), Whilst the long;` arms oil" the levers oit the parallel series fl, and (i are articulated to the rods 30, 51, 32. Each ot' the rods has at its lett hand end in the figure tivo opposite hook openings 233 and 3st and to the lett of these openings each rod has a tail piece Springs :lh pull the tail pieces downwards so that these tails rest on the :tall rods 3T and E38. These tu'o sets el rods appear in the drawing` to he in the saine plane, but the fall rods El are longo; and extend to the tails 35 ot' the rods 2?, 28, 29, Whilst the i'all rods 3S are short and extend only to the tails 35 oiA the lower series ot' rods 30, 3l, 32. The tall rods ll" and 38 have projections lying' over a bar Lil on a swing lever Ll0. After each stitch, the har lll lilts all the tall rods, whereupon the jacquard card 45 is nioved 'forward in the known manner through one step so as to bring a new transverse rovv oit holes opposite the ieeler pins Llei- 'lhe card traine is then swung troni lelt to right in the ligure in the ordinary inanncr, so that the eeler pins all pass through the holes in the card, it' there a hole opposite, or are jnishedtothe .1.fight" it no hole is opposite; In this way the particular selection of lfeelers and ultimately of adjusting' levers l-t is inade;

rlhe leeler pins il are carried by suitably guided sliding jacks 4t2, having butts 4:3.

"illhen no hole. in the pattern card is opposite any given 'feeler pin illfl the butt oi' its jack 1li), is pushed to the right, as indicated at Lll and When there is a hole opposite the leeler pin, the hutt remains stationary in the position indicated at Llli. '.ihe swing lever Ll0 now drops the tall levers 3T, 38 so that soine will drop into the lower positions and others will he interfered with or intercepted by the butts Ll?) lwhich have remained sta tionary. In this way any single one or any eonibination of the rods 2?-32 may be held up so that the upper openings 33 are in engagement with the driving pins 5() oi the lever L.i8 or the pin 5l ol the lever l-S). ln the position illustrated the rods 2, 29 and 30 are. held with their openings 33 in operative engagement with the driving' members a8 and elf), whichever applies. Those rods (28, 3l, S2 in the selection illustrated) Whose jacks l2 were inoved bach With their butts as at d3', drop with their fall rods so that the lower openings lll engage over lined hars 52 in the case olf the upper series and 5l in the case oi the lower series. Ailter t-hc operation ot the rods xl7-32, the .swing lever et() again raises the :tall levers 37, 38 and a lever 5st returns the jaclcs so that the roiv ol ieeler pins ist is in condition to receive the next selection. The jacquard inechanisin described is substantially oil known il'orin and does not in itself constitute a novel ieature of this invention, but its del moved to the left by a single unit, profv vided none ot' the other adjusting levers is operated. If only Vthe adjusting lever 4 is moved, the frame setting rack 26 Vreceives a movement of two units. It the lever 2 is moved by its rod 28, Vthe rack 26 receives a movement of 4 units. rThe .individual values in units of the movements effected by the separate levers may be tabulated as follows:

If lever 1 unit.

It' lever 2 units.

If lever 4 units.

If lever 8 units.-

It lever 16 units.

If lever 6 only is selected, 32 units. K

The movement values of all the .levers selected, when a combination of more than one is rendered operative by the jacquard pattern car-d, are as will be understood, summed up in the movement ofthe final lever 18 of' the chain and by it transmitted to the frame setting-rack 26. If all the adjusting levers 1-6 were operated, the movement of the ,lever 18 would be equal to the sum of the units column above, Ythatis 63 units.

1 only is selected, rack 26 moves 4 only is selected, rack 26 moves 2 only is selected, rack 26 5 only is selected,'raclr 26 moves 3 only is selected, rack 26 moves rack 26 moves selec-ted, so that the movement of the. frame setting rack 26, will in this case be 1-l-2-j-16 units:19 units from right to left.

lVith this organization of the lever system, it will be recognized that the six pivot points, of the chain levers 13-18 are definite basic points by virtue of their location on the adjusting levers 1-5, which yare provided with the fixed fulcrums l'-12 and Aare fixed not as regards actual movement, but

in the sense that their distance from the fixed iulcrums 7-12 is a fixed definite distance. The elasticity which can enter this structure is thus limited to the variation which can enter betwixt two adjacent adjusting levers, such as between the l' adjusting lever 2 and lever 5, or between levers 5 and 3 or 3 and 6. Any errors which may creep in can only be exceedingly small and the system cannot act acoumulatively on such errors. The smallest values of unit movements aretransmitted from the left hand in the chain of levers and of necessity has to HIOVQS K With the selection indicated in dot and dash lines, levers 1, 4 and 3 have been pass through the whole chain, so'that the elimination ot' elasticity in the chain is of especial importance for such movements. This rigidity results from the distribution along the series, that isat intervals along` the chain of levers, 13-1.8, otl the fixed fulc-rums 7, 8, 9, 10, 11 and 12. It will further be seen that the bending moment applied by each chain leve-r to its adjustinglever isincident at a point nearer the fixed fulcrum than the connection of the adjusting lever to the operating rods 27 This also assists in contributing rigidity to the transmission chain.

claim:VY

1. In' an embroidery machine having aA jacquard card mechanism, 4a constant movement driving member', and a variable movement work frame rack, transmuting means interposed between the constant movement driving member and the variable movement work frame rack, comprising operating rods controlled from the jacquard card mechainterposed between the constant movementdrivingV member and the variable movement work Vframe rack, comprising twol sets of operating rods controlled from the j acquari card mechanism, anadjusting lever for each operating rod of one set pivoted thereto and having a xed Jfulcrum at one end, an adjusting lever for leach operating rod of the other set pivoted thereto and having a fixed fulcrum located intermediately of its length, and an interconnected chain of levers pivoted on said adjusting levers and pivotally connected at one end of the chain to a fixed fulcrum, and at the other end to the work frame rack.

3. In .an embroidery machine having a jacquard card mechanism, a constant movement driving member, and a variable movementiwork frame rack, transmuting means interposed between the constant movement driving member andthe variable movement work frame rack, comprising two sets of operating rodsl controlled Vfrom the. jacquard card mechanism, an adjusting lever for each operating rod of one set, pivoted thereto and having a fixed fulcrum at one end, an adjusting lever for each operating rod of the other set, pivoted thereto and having a fixed fulcrum located intermediately of its length, the adjusting leve-rs of each set being parallel and the sets arranged alternately.

and an interconnected chain ef levers piveted on said adjusting levers and pivetally Connected at one end el? the ehziin te a fixed fnlernln and at the other end te the werk frame rack.

4L. In en embroidery nmehine having; a jacquard card mechanism, a constant inerement drivingr ineinherland a variable nieve ment werk traine raelr, trannuitingl ineens interposed between the constant movement drivingl member :ind the variable movement Work frame rank, eoinprfng' two sets et operating; reds controlled trein the jacquard card mechanism. an adjusting lever for eeeh operating red et one set, pivoted thereto and having a .fixed fiilernm at one end, en adjusting' lever :ter each operating red oit the other set pivoted thereto and having a fixed ulernm located intermedieiely el its length, the adjusting levers 0l? esirh set beingpan allel and the sets arranged alternately? and further levers piveted at pointe intermediate of' their length te Said adjusting levers and connected at their ends to torni a chain of levers, one end of seid chain being pivoted te a 'fixed fnlernin and the other end to the Work :traine rack.

In an enihreidery machine having a jacquard card mechanism. a constant movement driving member, und a veriahle movement work frame raek, transmntng' means interposed between the constant. nieven'xent driving member and the Variable movement Werl; -trame rack, eeniprising` two Vsets 0i operating: reds controlled from the jacquard Card n'ieehaniein, an adjusting lever for each operating red et' one set, pivoted thereto and having a fixed tnlernm at one end, an adjusting lever for each operating rod of the other set pivoted thereto :ind having; a [iXed tnlermn located interniediately et its length, 'tin-ther levers piveted aft intermediate peints te said adjustinglevers and having` lone; and ehort arme, and Connecting links frein. the short arm of one lever to the loner erin el: the next so :rs te form a chain of levers, one end et said ehain being pivoted te a lined fnleruin and the other end to the Work frame rack.

MAX I-IADAM. 

